Rotating mechanical stoker.



S. H. DUNNING. ROTAT'ING MEoHAmcAL sToKER.

APPLICATION FILED JULY 16, 1914.

Patented N 0V. v24, 1914.

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SAMUEL IH. DUNNING, OE PATERSON, NEW JERSEY.

RGTATING MECHANICAL STOKER.

Specification of lLetters Patent.

Patented Nov. 24, 1914,

Application led July 16, 1914. Serial No. 851,243.

To alf whom t may concern:

Be it known that I, SAMUEL H. DUNNING,

Y a citizen of the' United States, and a resident of Paterson, in the county of Passaic and State of New Jersey, have made and invented certain new and useful Improvements iny Rotating Mechanical Stokers, of which the following is a specitication. 4

A My invention relates to an improvement in rotating mechanical stolrers, such, for instance, as are employed on locomotives, and more particularly to that part or portion thereof which I have te med the spreader, that is, that portion onto or into which the fuel is conveyed and thereby thrown or spread onto the fire-bed, the object being to provide a device of this character which shall be simple and economical to manufacture, easily and readily assembled, and which, by reason of its formation, will evenly feed or spread the fuel over the desired area.V

A further object of the invention is to so Vconstruct the spreader that any and all danger of .its being injured or destroyed by heat Y will be overcome, and with these and other ends in view consists in certain novel features of construction and combinations of parts as will 'be hereinafter fully described and' pointed out in the claims.

In the accompanying drawings, Figure 1 is a vertical sectional view of my improved spreader, a part or portion of the conveyer being shown as assembled therewith; Fig. 2

is a top plan view of the device; Fig. 3 is a sectional view taken Ion the line-3 3 of Fig.

Y 1, looking in the direction as indicated by the arrow ;4 and'Figf. 4 is a sectional view `taken on the line 4 4 of Fig. 2 looking in the direction as indicatedby the arrow.

By reference to Fig. 1 it will be seen that my improved spreader is designed to be located at the top or upper end of ascrew conveyer, 5 representing the grate through which passes a cylindrical casing 6, in which revolves the conveyer 7 vsecured to the rotating` hollow shaft 8, the fuel, in a pulverizefh condition, being conveyed through the cylindrical casing 6 until it is fed or deposited into or onto the' flange or shelf of the spreader. This spreader has somewhat the form of an inverted hollow truncated cone, the circular wall 9 being hollow to form a water chamber 10, the upper and outer flaring edge 13 having integrally formed therewith the two cross-arms 11, 12,

rotated by any suitable means (not shown) and through which is fed water, or other cooling agent, from any suitable source of supply, the water passing up through the pipe and out through the openings 16, into and through the hollow arms 11 and 12, and into the chamber 10 forme-d by the hollow circular wall 9, it being understood that the pipe 14 is rigidly secured to the spreader in order to rrotate the same when in service. The lowei-or contracted end of thespreader extends somewhat below,r and encircles, the

upper en d ofthe cylindrical casing 6, the

inner surface of the wall 9 .bearing against a ring 17 rigidly secured to the casing 6,

vsaid wall 9 being provided with an inwardly turned flange or shelf 18 resting upon and over the extreme upper edge of said casing 6 and ring 17. Between the inner surface of the wall 9 and said ring 17 is provided a row or series of balls or rollers 19, in order-to reduce the friction between the rotating spreader and said ring. The extreme lower end of the hollow wall of the spreader fits in a hollow' ring 20 from which lead outlet water pipes 21, the latter being' connected with the tank or reservoir (not shown) containing the cooling agent, this construction and arrangement of parts permitting a continuous fiow or circulation this circular wall extending from the gratethan said upper edge of the spreader, but not 5 upwardly to about the upper edge 13 of the spreader.

Inorder to avoid any dust or dirt finding its way into the ring 20, in which the lower edge of the spreader rotates, I secure to the wall 9 an inclined shelf or hood 23 extending downwardly and outwardly over the ring 20.

In order to assist in the proper spreading of the 'fuel by the rotating spreader, I form on the latter the curved ribs or flanges 'z2-l also made hollow as illustrated in Fig. 4 of the drawings, these ribs or iianges gradually increasing in height from their lower ends to about the center oi their length, then gradually decreasing in height' and merging into the upper edge of the spreader, the highest portion of said ribs being somewhat higher as high as they upper edges of the cross-arms 11 and l2, this particular formation serving to assist the cross-arms in evenly throwing.

or spreading the pulverized material or .fuel over the lire-bed.

The rotating screw conveyer 7 carries the iluel upwardly untilthe latter is fed onto the lupwardly flaring wall 9 of therotating spreader, which in turn carries it upwardly, andfwithia tendency to spread it, the fuel being carrie-d in a circular path by the hollow ribs or flanges 24. A portion of the material is thrown by these ribsor flanges outwardly to a short distance beyond'tliev wall 22, other portions' of the 'material being caught by the cross-arms 11 and 12 Aand thrown to a greater distance, the result being ,4 that the material is evenly spreadfrom the wall 22 outwardly to a distance in accordance with the rate of speed at which the spreader is rotated. In other words, a part of the material as it rides up and over the outwardly flaring wall of the spreader, is, by reason of the langes, deposited at a short distance from ythe device, while the crossarms, being somewhat higher, and of a different shape, throw or spread their portions of the fuel to a somewhat greater distance.

From the foregoing it will be seen that my device is exceedingly simple in construction,

1,1 leges the spreader itself being cast hollow and of somewhat bellform in one piece, and that by reason of the provision of a constant circulation of water through the same, there is but little danger of its being injured or destroyed by the intense heat surrounding the same.

What I claim is 1. A device oi the character described comprising in part a spreader formed of somewhat bell-shape, and with a hollow wall forming a Water chamber, said spreader be-.

ing provided with arms extending across the upper and larger end thereoi and provided with a water chamber connnunicating with said former chamber, andhollowribs formed on the inner side of Vsaid spreader.

2. A device of the character described comprising in part a spreader formed with a hollow circula-r wall and with hollow arms extending across the ton thereoi` a rotating inlet water pipe rigidly secured to said crossa-rms for rotating said spreader and supplying water to the interior thereof, and hollow ribs formed on the inner side of said spreader. f

3. In a device of the character described, the combination with a cylindrical casing, an endless rotating conveyor contained within said casing, a spreader located at the upper end of sai d casing, said sprca der comprising a hollow casing, the lower end encircling said cylindrical casing, and the upper end being provided with hollow cross arms, a

pipe rigidly secured to said cross arms 'for rotating the samek and supplying water to the interior thereof, said spreader being provided with hollow ribs on the inner side thereof, a ring into which the lower end of said spreader rotates, and outlet water pipes leading from said ring, substantially as described.

Signed at New York borough of Manhattan in the county of New York and State of- New York this 15 day of July, A. D. 1914.

` SAMUEL H. DUNNING. Witnesses:

GEORGE E. Coon,

ANNA V. WALSH. 

